Automatic vent valve for preventing liquid spraying of storage tank

Abstract

The utility model discloses a storage tank anti-liquid-spraying automatic vent valve which comprises a vent valve body and a liquid-gas separation assembly, the vent valve comprises a valve body, a communicating pipe is integrally formed on the side wall of the valve body, a shell is integrally formed at the end, away from the valve body, of the communicating pipe, an exhalation valve plate is installed at the top of the valve body, and an air inlet is formed in the valve body. An air suction valve plate is mounted at the bottom of the shell; the liquid-gas separation assembly comprises an L-shaped mounting rod, the L-shaped mounting rod is fixedly connected to the side wall of the valve body, and a vertical rod of the L-shaped mounting rod coincides with the central axis of the valve body. The vent valve is provided with the liquid-gas separation assembly, when the vent valve exhales, flowing of oil gas can drive the liquid-gas separation blades to rotate, so that oil drops and gas in the oil gas are separated under the action of interception and centrifugal force of the liquid-gas separation blades, and the oil-gas separation capacity of the vent valve is improved; and meanwhile, the oil injection condition when the pressure suddenly rises can be avoided, and the use safety of the vent valve is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of storage tank safety equipment, and particularly relates to a storage tank anti-spray liquid automatic breather valve. BACKGROUND

[0002] The existing storage tank breather valve often causes oil and gas mixed liquid drops to be sprayed due to pressure fluctuation when temperature changes or oil is loaded or unloaded, thereby causing oil drop loss, environmental pollution and fire hazards. The traditional breather valve can balance pressure, but its oil and gas separation capacity is insufficient, which causes oil drops to be discharged with gas, and the breather valve is prone to spray liquid when the pressure in the oil tank rises suddenly, so that the use of the breather valve has safety hazards.

[0003] The information disclosed in this BACKGROUND section is only for the purpose of increasing the understanding of the background of the present utility model and should not be regarded as an acknowledgment or any form of suggestion that it forms prior art of this utility model that is publicly known. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a storage tank anti-spray liquid automatic breather valve, which can solve the problems of insufficient oil and gas separation capacity of the breather valve and safety hazards caused by easy oil spraying.

[0005] In order to achieve the above-mentioned purpose, the technical scheme provided by a specific embodiment of the utility model is as follows:

[0006] A storage tank anti-spray liquid automatic breather valve comprises:

[0007] The breather valve body comprises a valve body, a communication pipe is integrally formed on the side wall of the valve body, a shell is integrally formed at the end of the communication pipe away from the valve body, and an exhalation valve plate is installed on the top of the valve body. When the pressure in the storage tank rises, the pressure in the storage tank will push open the exhalation valve plate, so that the pressure in the storage tank is discharged in the form of exhalation together with oil and gas, and the pressure in the storage tank is normal. An inhalation valve plate is installed at the bottom of the shell. When the pressure in the storage tank decreases, the negative pressure in the storage tank will suck open the inhalation valve plate, so as to inhale air into the storage tank through the inhalation valve plate, and the pressure in the storage tank is normal.

[0008] The liquid-gas separation assembly comprises an L-shaped mounting rod fixedly connected to the side wall of the valve body, which ensures the stability of the L-shaped mounting rod installed in the structure of the valve body. The vertical rod of the L-shaped mounting rod coincides with the central axis of the valve body, and the upper end of the vertical rod of the L-shaped mounting rod is rotationally connected with a mounting ring, so that the mounting ring can rotate when being installed on the L-shaped mounting rod. A plurality of liquid-gas separation blades are fixedly connected to the outer side wall of the mounting ring at equal intervals, and the rotation of the mounting ring can drive the rotation of the plurality of liquid-gas separation blades, so that the plurality of liquid-gas separation blades can rotate when being installed in the valve body, so as to separate the oil gas carried out by the high pressure in the storage tank through the rotation of the liquid-gas separation blades. A plurality of first oil conveying grooves are formed in the bottom of each of the plurality of liquid-gas separation blades, so that the oil droplets separated from the oil gas can flow through the first oil conveying grooves and finally return to the storage tank under the action of gravity.

[0009] In one or more embodiments of the present application, the top of the valve body is detachably mounted with a mounting shell, and the exhalation valve plate is mounted between the mounting shell and the valve body. The mounting shell ensures the normal and stable operation of the exhalation valve plate, and the detachable mounting shell facilitates the maintenance and replacement of the internal components of the valve body.

[0010] In one or more embodiments of the present application, the number of the plurality of liquid-gas separation blades is at least six, and the liquid-gas separation blades are arranged as backward bending blades, so that the separation effect of the liquid-gas separation blades on the outward exhaled oil gas is better.

[0011] In one or more embodiments of the present application, the surface of the liquid-gas separation blade is provided with micro-texture, and the surface of the liquid-gas separation blade is sprayed with an oil-repellent coating. By providing the surface of the liquid-gas separation blade with micro-texture and an oil-repellent coating, the oil droplets and impurities intercepted on the surface of the liquid-gas separation blade are prevented from adhering to the surface of the liquid-gas separation blade, so that the surface of the liquid-gas separation blade remains clean and ensures that the oil gas can drive the rotation during exhalation.

[0012] In one or more embodiments of the present application, a limiting ring is fixedly connected to the upper end side wall of the vertical rod of the L-shaped mounting rod, and a ceramic bearing is mounted on the limiting ring at the upper end of the vertical rod of the L-shaped mounting rod. The limiting ring supports the ceramic bearing, and the ceramic bearing is made of ceramic with good corrosion resistance, so as to ensure that it will not be corroded in the oil gas environment.

[0013] In one or more embodiments of the utility model, the installation ring is installed on the outside of the ceramic bearing, and the installation ring is installed on the L-shaped mounting rod and can rotate through the ceramic bearing. The upper end of the vertical rod of the L-shaped mounting rod is rotationally connected to a limiting nut above the ceramic bearing. Through the clamping cooperation of the limiting nut and the limiting ring, the stability of the liquid-gas separation blade after installation is ensured, and the limiting nut can be disassembled, so that the liquid-gas separation blade can be maintained and replaced during use.

[0014] In one or more embodiments of the utility model, a plurality of oil interception rings are fixedly connected to the inner side wall of the valve body, and the bottoms of the plurality of oil interception rings are all inclined surfaces. When the liquid-gas separation blade rotates to throw oil gas onto the inner side wall of the valve body, the oil gas will contact the oil interception rings, and the oil gas is intercepted and separated through the oil interception rings, thereby improving the separation effect of the oil gas.

[0015] In one or more embodiments of the utility model, the plurality of oil interception rings are all arranged above the liquid-gas separation blade, and a plurality of second oil conveying grooves are equally spaced in the vertical direction on the plurality of oil interception rings. The oil droplets separated by the oil interception rings are returned to the storage tank through the second oil conveying grooves.

[0016] In one or more embodiments of the utility model, an oil-removing filter screen and an activated carbon layer are installed above the oil interception rings on the inner side wall of the valve body, and the activated carbon layer is arranged above the oil-removing filter screen. When the gas continues to flow upward after being separated by the liquid-gas separation blade, the gas passes through the oil-removing filter screen and the activated carbon layer. The oil droplets in the gas are further separated by the oil-removing filter screen, and then the harmful components in the gas are filtered by the activated carbon layer, thereby effectively reducing VOC emissions.

[0017] In one or more embodiments of the utility model, a fire-resistant mesh is installed between the mounting shell and the valve body, and the fire-resistant mesh is arranged on the periphery of the exhalation valve plate. After the gas during exhalation is subjected to oil-gas separation and filtration, the gas is discharged to the outside through the fire-resistant mesh. The fire-resistant mesh can effectively prevent the discharged gas from burning when encountering an open flame and entering the valve body, thereby ensuring the safety of the breather valve and the storage tank.

[0018] Compared with the prior art, the utility model is provided with a liquid-gas separation assembly. When the breather valve exhales, the flow of oil gas drives the liquid-gas separation blade to rotate, so that the oil droplets and the gas in the oil gas are separated under the interception and centrifugal force of the liquid-gas separation blade, thereby improving the oil-gas separation capacity of the breather valve. At the same time, the oil injection situation during pressure surge can be avoided, and the safety of the breather valve in use is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Figure 1 It is a schematic view of the automatic vent valve of the storage tank blowout prevention liquid in an embodiment of the present application.

[0021] Figure 2 It is a sectional view of the automatic vent valve of the storage tank blowout prevention liquid in an embodiment of the present application.

[0022] Figure 3 It is a sectional view of the automatic vent valve of the storage tank blowout prevention liquid in an embodiment of the present application.

[0023] Figure 4 It is a schematic view of A in the present application. Figure 3

[0024] Figure 5 It is a schematic view of B in the present application. Figure 3

[0025] Figure 6 It is a schematic view of the oil-gas separation blade and the oil interception ring in the present application.

[0026] Main figure mark explanation:

[0027] 1-vent valve body, 11-valve body, 12-communication pipe, 13-housing, 14-exhalation valve plate, 15-inhalation valve plate, 16-mounting shell, 2-liquid-gas separation assembly, 21-L-shaped mounting rod, 22-liquid-gas separation blade, 23-first oil conveying groove, 24-mounting ring, 25-ceramic bearing, 26-limiting ring, 27-limiting nut, 28-oil interception ring, 29-second oil conveying groove, 210-oil filtering screen, 211-activated carbon layer, 212-fireproof screen. DETAILED DESCRIPTION

[0028] In order to make the person skilled in the art better understand the technical solutions in the present application, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor should belong to the protection scope of the present application.

[0029] As​​Figures 1-3 The utility model discloses an automatic venting valve of liquid spray prevention of storage tank, which comprises a venting valve body 1 and a liquid-gas separation assembly 2.

[0030] As shown in the figure, Figures 1-3 The venting valve body 1 comprises a valve body 11, a communication pipe 12 is integrally formed on the side wall of the valve body 11, a shell 13 is integrally formed on the end of the communication pipe 12 away from the valve body 11, and an exhalation valve plate 14 is installed on the top of the valve body 11. When the pressure in the storage tank rises, the pressure in the storage tank will push open the exhalation valve plate 14, and the oil gas in the storage tank is discharged by the exhalation mode, so that the pressure in the storage tank is normal. The bottom of the shell 13 is provided with an inhalation valve plate 15, and when the pressure in the storage tank decreases, the negative pressure in the storage tank will suck open the inhalation valve plate 15, so as to suck air into the storage tank through the inhalation valve plate 15, so that the pressure in the storage tank is normal.

[0031] As shown in the figure, Figures 1-3 The top of the valve body 11 is detachably provided with a mounting shell 16, and the exhalation valve plate 14 is installed between the mounting shell 16 and the valve body 11. The mounting shell 16 ensures the normal and stable operation of the exhalation valve plate 14, and the detachable mounting shell 16 facilitates the maintenance and replacement of the internal components of the valve body 11.

[0032] As shown in the figure, Figure 2 , Figure 3 and Figure 5 The liquid-gas separation assembly 2 comprises an L-shaped mounting rod 21, which is fixedly connected to the side wall of the valve body 11, so as to ensure the stability of the L-shaped mounting rod 21 installed in the structure of the valve body 11. The vertical rod of the L-shaped mounting rod 21 coincides with the central axis of the valve body 11, and the upper end of the vertical rod of the L-shaped mounting rod 21 is rotatably connected with a mounting ring 24, so that the mounting ring 24 can rotate when installed on the L-shaped mounting rod 21. A plurality of liquid-gas separation blades 22 are fixedly connected to the outer side wall of the mounting ring 24 at equal intervals, and the rotation of the mounting ring 24 can drive the rotation of the plurality of liquid-gas separation blades 22, so that the plurality of liquid-gas separation blades 22 can rotate when installed in the valve body 11, so as to separate the oil gas carried out by exhalation when the pressure in the storage tank is high. A plurality of first oil conveying grooves 23 are formed in the bottom of the plurality of liquid-gas separation blades 22, so that when the oil droplets in the oil gas are separated out by the liquid-gas separation blades 22, the oil droplets can flow through the first oil conveying grooves 23 and finally return to the storage tank under the action of gravity.

[0033] Specifically, when the pressure in the tank rises, the exhalation valve plate 14 will act to exhale, so that the oil gas is carried by the positive pressure in the tank to flow upward in the valve body 11. The oil gas under pressure will contact the plurality of liquid-gas separation blades 22 in the valve body 11, so that the liquid-gas separation blades 22 rotate in the valve body 11 by the impact of the pressure of the oil gas, and the centrifugal force of the rotation of the liquid-gas separation blades 22 changes the flow direction of the oil gas, so that the oil gas is thrown to the inner side wall of the valve body 11, and the oil droplets in the oil gas are gathered on the inner side wall of the valve body 11 and then flow back to the tank. At the same time, when the oil gas contacts the liquid-gas separation blades 22, part of the oil droplets will be intercepted by the liquid-gas separation blades 22 and then flow through the first oil conveying groove 23. Therefore, when the pressure in the tank rises and the oil gas is exhaled outward, the rotation of the plurality of liquid-gas separation blades 22 can separate the oil droplets from the gas in the oil gas, thereby avoiding the oil droplets from being carried out of the valve body 11 when the vent valve exhales. When the pressure in the tank suddenly increases, the liquid-gas separation blades 22 will be quickly rotated to avoid the occurrence of oil spouting when the pressure suddenly increases, thereby ensuring the safety of the vent valve in use.

[0034] Preferably, the number of the plurality of liquid-gas separation blades 22 is at least six, and the liquid-gas separation blades 22 are arranged as backward-curved blades, so that the separation effect of the liquid-gas separation blades 22 on the exhaled oil gas is better.

[0035] Further, the surface of the liquid-gas separation blades 22 is provided with micro-texture, and the surface of the liquid-gas separation blades 22 is sprayed with an oil-repellent coating. By providing the surface of the liquid-gas separation blades 22 with micro-texture and an oil-repellent coating, the oil droplets and impurities intercepted by the liquid-gas separation blades 22 are prevented from adhering to the surface of the liquid-gas separation blades 22, so that the surface of the liquid-gas separation blades 22 remains clean and ensures that the oil gas can drive the rotation of the liquid-gas separation blades 22 when exhaling.

[0036] As shown in Figure 3 As shown in Figure 5 The upper end of the vertical rod of the L-shaped mounting rod 21 is fixedly connected with a limiting ring 26, and a ceramic bearing 25 is mounted on the upper end of the vertical rod of the L-shaped mounting rod 21 and supported by the limiting ring 26. The ceramic bearing 25 is made of ceramic material with good corrosion resistance, so as to ensure that it will not be corroded in the oil gas environment.

[0037] As shown in Figure 3 As shown in Figure 5As shown, the mounting ring 24 is mounted on the outside of the ceramic bearing 25, and the mounting ring 24 is mounted on the L-shaped mounting rod 21 through the ceramic bearing 25 to rotate. The upper end of the vertical rod of the L-shaped mounting rod 21 is rotationally connected to the limiting nut 27 above the ceramic bearing 25. Through the clamping cooperation of the limiting nut 27 and the limiting ring 26, the stability of the liquid-gas separation blade 22 after installation is ensured, and the dismounting of the limiting nut 27 allows the liquid-gas separation blade 22 to be maintained and replaced during use.

[0038] As shown in Figure 3 and Figure 6 As shown, a plurality of oil intercepting rings 28 are fixedly connected to the inner wall of the valve body 11, and the bottoms of the plurality of oil intercepting rings 28 are provided as inclined surfaces. When the liquid-gas separation blade 22 rotates to throw oil gas to the inner wall of the valve body 11, the oil gas will contact the oil intercepting ring 28, and the oil droplets are separated by the oil intercepting ring 28, thereby improving the separation effect of the oil gas.

[0039] As shown in Figure 3 and Figure 6 As shown, the plurality of oil intercepting rings 28 are arranged above the liquid-gas separation blade 22, and a plurality of second oil conveying grooves 29 are arranged on the plurality of oil intercepting rings 28 at equal intervals in the vertical direction. The oil droplets separated by the oil intercepting ring 28 are returned to the storage tank through the second oil conveying grooves 29.

[0040] As shown in Figure 3 In combination with Figure 4 As shown, an oil-removing filter screen 210 and an activated carbon layer 211 are mounted on the inner wall of the valve body 11 above the oil intercepting ring 28. The activated carbon layer 211 is arranged above the oil-removing filter screen 210. After the oil gas is separated by the liquid-gas separation blade 22, the gas continues to flow upward and passes through the oil-removing filter screen 210 and the activated carbon layer 211. The oil-removing filter screen 210 further separates the oil droplets in the gas, and then the activated carbon layer 211 filters harmful components in the gas, effectively reducing VOC emissions.

[0041] As shown in Figure 3 As shown, a fire-retardant screen 212 is mounted between the mounting shell 16 and the valve body 11, and the fire-retardant screen 212 is arranged on the periphery of the exhalation valve plate 14. After the gas during exhalation is subjected to oil-gas separation and filtration treatment, it is discharged to the outside through the fire-retardant screen 212. The fire-retardant screen 212 can effectively prevent the discharged gas from entering the valve body 11 when it encounters an open flame, thereby ensuring the safety of the breather valve and the storage tank.

[0042] When the pressure in the storage tank rises, the exhalation valve plate 14 is pushed open by the pressure, so that the oil gas in the storage tank is discharged outward through the valve body 11, and when the oil gas flows in the valve body 11, the oil gas collides with the plurality of liquid-gas separation blades 22, the liquid-gas separation blades 22 intercept the oil gas, and the oil gas drives the liquid-gas separation blades 22 to rotate, part of the oil droplets in the oil gas adhere to the liquid-gas separation blades 22 and flow back to the storage tank through the first oil return groove 23, and when the liquid-gas separation blades 22 rotate, the oil gas is thrown to the inner side wall of the valve body 11 under the action of centrifugal force, so that the oil droplets are intercepted by the plurality of oil interception rings 28, and the oil droplets in the oil gas flow back to the storage tank through the second oil return groove 29 under the action of gravity; after the oil gas is separated by the liquid-gas separation blades 22, the oil droplets in the oil gas are further separated by the oil droplet separation screen 210 when the oil gas continues to flow upward, and the activated carbon layer 211 filters the oil gas, thereby reducing VOC emission, and finally the oil gas is discharged to the outside through the fire-resistant screen 212, thereby ensuring safety during exhalation and reducing the oil content carried to the outside during exhalation.

[0043] It is apparent for those skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, and the present application can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Accordingly, the embodiments are to be considered in all respects as illustrative and not restrictive, the scope of the present application being indicated by the appended claims rather than by the above description, and it is intended to be encompassed within the present application all changes which come within the meaning and range of equivalency of the claims. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0044] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. An automatic vent valve for a blowout preventer fluid, characterized by, The utility model relates to a kind of air valve, including: Air valve body, including valve body, the side wall of the valve body is integrally formed with communication pipe, the end of the communication pipe away from the valve body is integrally formed with shell, the top of the valve body is installed with exhalation valve plate, the bottom of the shell is installed with inhalation valve plate; Liquid-gas separation assembly, including L-shaped mounting rod, the side wall of the valve body is fixedly connected with the L-shaped mounting rod, the vertical rod of the L-shaped mounting rod coincides with the central axis of the valve body, the upper end of the vertical rod of the L-shaped mounting rod is rotatably connected with mounting ring, the outer side wall of the mounting ring is fixedly connected with a plurality of liquid-gas separation blades in equal intervals, the bottom of a plurality of the liquid-gas separation blades is provided with a plurality of first oil conveying grooves.

2. An automatic vent valve for a blowout preventer fluid according to claim 1, wherein, The top of the valve body is detachably mounted with mounting shell, and the exhalation valve plate is mounted between the mounting shell and the valve body.

3. An automatic vent valve for a blowout preventer according to claim 1, wherein, The number of a plurality of the liquid-gas separation blades is at least six, and the liquid-gas separation blades are arranged as backward bending blades.

4. The automatic breather valve for tank blowout preventer fluid according to claim 1, characterized in that, The surface of the liquid-gas separation blade is provided with microtexture, and the surface of the liquid-gas separation blade is sprayed with oil-repellent coating.

5. An automatic breather valve for a tank containment system according to claim 1, wherein, The upper end of the vertical rod of the L-shaped mounting rod is fixedly connected with a limiting ring on the outer side wall, and the upper end of the vertical rod of the L-shaped mounting rod is mounted with a ceramic bearing on the limiting ring.

6. An automatic vent valve for a blowout preventer fluid, according to claim 5, wherein, The mounting ring is mounted on the outer side of the ceramic bearing, and the upper end of the vertical rod of the L-shaped mounting rod is rotatably connected with a limiting nut above the ceramic bearing.

7. An automatic vent valve for a blowout preventer according to claim 1, wherein, A plurality of oil intercepting rings are fixedly connected to the inner side wall of the valve body, and the bottom of each of the plurality of oil intercepting rings is provided as an inclined surface.

8. An automatic venting valve for a blowout preventer fluid according to claim 7, wherein A plurality of the oil intercepting rings are arranged above the liquid-gas separation blades, and a plurality of second oil conveying grooves are formed in the vertical direction at equal intervals on the plurality of oil intercepting rings.

9. An automatic venting valve for a blowout preventer fluid according to claim 8, wherein, An oil-repellent filter screen and an activated carbon layer are mounted on the inner side wall of the valve body above the oil intercepting rings, and the activated carbon layer is arranged above the oil-repellent filter screen.

10. The automatic breather valve for tank blowout preventer fluid according to claim 2, characterized in that, A fire-retardant screen is mounted between the mounting shell and the valve body, and the fire-retardant screen is arranged at the periphery of the exhalation valve plate.

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